Planar Doppler velocimetry measurements of flows using imaging fibre bundles

Show simple item record Nobes, David S. Ford, Helen D. Tatam, Ralph P. 2017-06-22T13:48:48Z 2017-06-22T13:48:48Z 2003-08-03
dc.identifier.citation David S. Nobes, Helen D. Ford and Ralph P. Tatam en_UK
dc.identifier.isbn 0819450642
dc.identifier.issn 0277-786X
dc.description.abstract The development of a planar Doppler velocimetry is described. The technique is capable of measuring the three, instantaneous components of velocity in two dimensions using a single pair of signal and reference cameras. PDV can be used to measure the instantaneous 3-D velocity of a fluid by using an absorption line filter (ALF) to determine the Doppler shifted frequency of a narrow line pulsed laser (Nd:YAG) that has been scattered off particles seeded into the flow. The velocity of the fluid is determined using the Doppler formula and is dependent on the laser direction and the viewing direction. Hence, only one velocity component of the flow is measured. This component can be measured in two spatial dimensions using an array detector such as a CCD camera. To capture the three components, three such measurement heads have been used viewing from different angles. In the technique presented here the three views are ported from the collection optics to a single imaging plane using flexible fibre imaging bundles. These are made up of a coherent array of single fibres and are combined at one end as the input plane to the measurement head. The paper discusses the issues involved in developing a full three-dimensional velocity measurement system. en_UK
dc.language.iso en en_UK
dc.publisher SPIE - International Society for Optics and Photonics en_UK
dc.rights Copyright © 2003 Society of Photo-Optical Instrumentation Engineers. This paper is made available with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. DOI:10.1117/12.505842
dc.subject Planar Doppler velocimetry en_UK
dc.subject imaging fibre bundles en_UK
dc.subject low velocity measurement en_UK
dc.title Planar Doppler velocimetry measurements of flows using imaging fibre bundles en_UK
dc.type Conference paper en_UK

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